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CN-121991296-A - Holographic photocuring technology-based mechanochromatic elastic material and preparation method thereof

CN121991296ACN 121991296 ACN121991296 ACN 121991296ACN-121991296-A

Abstract

The invention discloses a holographic photocuring technology-based mechanochromatic elastic material and a preparation method thereof, wherein the mechanochromatic elastic material comprises, by mass, 48% -90% of a polymer matrix, 0.3% -4% of a photoinitiation system, 6% -50% of a recording component, the polymer matrix comprises, by mass, 73% -89% of an acrylic ester monomer, 10% -25% of a mercaptan monomer and 0.5% -3% of a catalyst, the photoinitiation system comprises a photosensitizer and a co-initiator, the use amounts of the photosensitizer and the co-initiator are respectively 0.05% -1% and 0.2% -3% of the total mass of the mechanochromatic elastic material, and the recording component comprises, by mass, 62% -85% of a first fluorine-containing acrylic ester, 10% -35% of a second fluorine-containing acrylic ester and 0% -6% of a crosslinking agent. The mechanochromic elastic material has excellent mechanical property and optical property, can provide an important material foundation for a new generation of intelligent flexible optical devices, and has wide application prospect.

Inventors

  • XIAO MING
  • GUO FANGLIN

Assignees

  • 四川大学

Dates

Publication Date
20260508
Application Date
20260203

Claims (9)

  1. 1. A holographic photocuring technology-based mechanochromatic elastic material is characterized in that: the mass percent of the polymer matrix is 48% -90%, the photoinitiation system is 0.3% -4%, and the recording components are 6% -50%; the polymer matrix comprises 73-89% of acrylic ester monomers, 10-25% of mercaptan monomers and 0.5-3% of catalysts in percentage by mass; The photoinitiation system comprises a photosensitizer and a coinitiator, wherein the dosages of the photosensitizer and the coinitiator are respectively 0.05% -1% and 0.2% -3% of the total mass of the mechanochromic elastic material; The recording component comprises, by mass, 62% -85% of first fluorine-containing acrylic ester, 10% -35% of second fluorine-containing acrylic ester and 0% -6% of cross-linking agent.
  2. 2. The mechanochromatic elastomeric material of claim 1, wherein: The acrylic monomer comprises at least one of polyethylene glycol diacrylate, methyl methacrylate, n-butyl acrylate, hydroxyethyl acrylate, glycidyl acrylate, trimethoxy silicone propyl acrylate, bisphenol A diacrylate, 1, 6-hexanediol diacrylate, tri (ethylene glycol) diacrylate, glycerol propoxylate triacrylate, tri (2-hydroxyethyl) isocyanuric acid triacrylate, triacrylate pentaerythritol ester, trimethylolpropane triacrylate, trimethylolpropane trimethacrylate, pentaerythritol triacrylate, ethoxylated pentaerythritol tetraacrylate and hyperbranched acrylate.
  3. 3. The mechanochromatic elastomeric material of claim 1, wherein: The thiol monomer comprises at least one of dimercaptoethyl sulfide, 1-hexanethiol, 1-dodecanethiol, 1-octadecanethiol, 4-mercaptobenzoic acid, 2-mercaptoethanol, 3-mercaptopropionic acid, 11-mercaptoundecanoic acid, 1, 6-hexanedithiol, 1, 8-octanedithiol, 1, 10-decanedithiol, 1, 4-benzenedithiol, 4' -dimercaptobiphenyl, 2' -dimercaptodidiethyl ether, polyethylene glycol dithiol, 2' -dimercaptodiethyldisulfide, bis (3-mercaptopropyl) tetramethyl disiloxane, tris (2-mercaptoethyl) isocyanurate, tris (3-mercaptopropyl) silane, tetrakis (3-mercaptopropyl) silane, pentaerythritol tetrakis (3-mercaptopropionate) and trimethylolpropane tris (3-mercaptopropionate).
  4. 4. The mechanochromatic elastomeric material of claim 1, wherein: The catalyst comprises at least one of triethylamine, triethanolamine and 1, 8-diazabicyclo [5.4.0] undec-7-ene.
  5. 5. The mechanochromatic elastomeric material of claim 1, wherein: the photosensitizer comprises at least one of eosin, erythrosin, methylene blue, phycoerythrin, rose bengal.
  6. 6. The mechanochromatic elastomeric material of claim 1, wherein: The co-initiator comprises at least one of N-methyldiethanolamine, N-phenylglycine, triethanolamine, triethylamine, N-methyldiethanolamine, dimethylaminobenzoic acid methyl ester and 2- (4-methoxyphenyl) -4, 6-bis (trichloromethyl) 1,3, 5-triazine.
  7. 7. The mechanochromatic elastomeric material of claim 1, wherein: The first fluorine-containing acrylate comprises one of tetrafluoropropyl acrylate, octafluoropentyl acrylate, perfluorodecyl acrylate, perfluorooctyl ethyl methacrylate, perfluorohexyl ethyl acrylate, hexafluoroisopropyl acrylate, perfluorooctyl diacrylate, perfluoropolyether diacrylate, fluorinated ethylene glycol diacrylate and fluorinated siloxane diacrylate; The second fluorine-containing acrylic ester comprises one of tetrafluoropropyl acrylate, octafluoropentyl acrylate, trifluoroethyl acrylate, pentafluorophenyl acrylate, 2, 3-pentafluoropropyl acrylate and hexafluorobutyl acrylate; And the first fluoroacrylate and the second fluoroacrylate are different.
  8. 8. The mechanochromatic elastomeric material of claim 1, wherein: The cross-linking agent comprises at least one of 1, 6-hexanediol diacrylate, dipropylene glycol diacrylate, ethoxylated trimethylolpropane triacrylate, trifluoroethyl triacrylate, trimethoxy silicon propyl triacrylate, trimethylolpropane triacrylate, glycerol triacrylate and pentaerythritol triacrylate.
  9. 9. The method for preparing the mechanochromatic elastic material according to any one of claims 1 to 8, wherein the method comprises the following steps: in a darkroom or in a yellow light zone, comprising: mixing the polymer matrix with the photoinitiation system at room temperature to obtain a polymer matrix uniformly dispersed with the photoinitiation system; at room temperature, adding the recording component into a polymer matrix dispersed with a photoinitiation system to obtain a liquid mechanochromic elastic material; at room temperature, the liquid state electrochromic elastic material is made into a film, and the film is subjected to holographic interference, exposure and bleaching in sequence to obtain the electrochromic elastic film.

Description

Holographic photocuring technology-based mechanochromatic elastic material and preparation method thereof Technical Field The application belongs to the technical field of holographic optical materials, and particularly relates to a holographic photocuring technology-based electrochromic elastic material and a preparation method thereof. Background With the rapid development of intelligent automobiles and virtual reality technologies, holographic photopolymer materials are receiving extensive attention due to their mature preparation process and excellent optical regulation and control characteristics. The optical regulation mechanism of the material is derived from the Bragg diffraction effect of the internal periodic micro-nano structure on incident light. The holographic photoinduced polymer material system consists of three parts, including polymer matrix, photoinitiation system and recording monomer. The working principle of the method can be summarized in that a periodic light intensity distribution is formed inside the material under the action of a coherent laser interference field. In the interference light area, the photoinitiator generates a photolysis reaction to generate active free radicals to initiate photopolymerization of the recording monomer, while in the dark area, the photoinitiator remains unreacted. This spatially selective polymerization results in a concentration gradient of the recording monomer between the bright and dark fringes, which initiates diffusion migration of the dark monomer to the bright region and participates in the subsequent polymerization reaction. Through this mass transfer process, a bulk grating structure with periodic refractive index modulation is eventually formed inside the material. The diffraction efficiency of the material is mainly determined by the refractive index modulation degree) Increasing the index modulation significantly enhances the diffraction efficiency of the material, which provides an important approach for optimizing holographic storage and display device performance. At present, the refractive index modulation degree of the holographic photopolymer material is improved) The mainstream method of (2) is to introduce a high refractive index group in the recording monomer component, among which the benzene ring structure is most common. However, although the aromatic ring-based modification strategy can effectively improve the refractive index, the rigidity of the material is inevitably increased, so that the response characteristics of the material are mainly limited to non-mechanical response modes such as humidity response, temperature response and the like. With the rapid development of emerging fields such as flexible electronics, wearable devices and the like, the market is increasingly pressing for novel intelligent materials with excellent mechanical deformability (such as stretchability and bendability) and capable of maintaining good holographic optical properties. The material needs to meet the requirements of high refractive index modulation degree and excellent mechanical adaptability simultaneously so as to realize the dynamic optical regulation function under complex deformation. Disclosure of Invention The application aims at solving the technical bottleneck that the mechanical property and the optical property of the traditional holographic photo-induced polymer material are difficult to cooperatively optimize, and provides a holographic photo-curing technology-based electrochromic elastic material which simultaneously meets the high refractive index modulation degree and excellent mechanical adaptability and a preparation method thereof. The application provides a holographic photocuring technology-based mechanochromatic elastic material, which comprises, by mass, 48% -90% of a high polymer matrix, 0.3% -4% of a photoinitiation system and 6% -50% of a recording component; the polymer matrix comprises 73-89% of acrylic ester monomers, 10-25% of mercaptan monomers and 0.5-3% of catalysts in percentage by mass; The photoinitiation system comprises a photosensitizer and a coinitiator, wherein the dosages of the photosensitizer and the coinitiator are respectively 0.05% -1% and 0.2% -3% of the total mass of the mechanochromic elastic material; The recording component comprises, by mass, 62% -85% of first fluorine-containing acrylic ester, 10% -35% of second fluorine-containing acrylic ester and 0% -6% of cross-linking agent. Optionally, the mechanochromatic elastic material comprises, by mass, 48% -90% of a polymer matrix, 0.3% -1.8% of a photoinitiation system and 10% -50% of a recording component; the polymer matrix comprises, by mass, 83% -89% of acrylic ester monomers, 10% -16% of thiol monomers and 0.5% -1.1% of catalysts; The photoinitiation system comprises a photosensitizer and a coinitiator, wherein the dosages of the photosensitizer and the coinitiator are respectively 0.05% -0.25% and 0.2% -1.2% of the total mass of